It's seams that Newsletter is a requested module. I just report some already posted messages:
http://www.liferay.com/web/guest/community/forums/-/message_boards/message/1167016
http://www.liferay.com/web/guest/community/forums/-/message_boards/message/356515
http://www.liferay.com/web/guest/community/forums/-/message_boards/message/1848484
http://www.liferay.com/web/guest/community/forums/-/message_boards/message/322052
Particular interess seams to be a newsletter module integrated with CMS capability.
D.
